<template>
  <div class="i-button-group">
    <slot></slot>
  </div>
</template>
<script>
  export default {
    name:"PandaButtonGroup",
    mounted(){
        for(let node of this.$el.children){
           let name = node.nodeName.toLowerCase()
           if(name !== 'button') {
               console.warn(`g-button-group 的子元素应该全是g-button，但是你写的是${name}`)
           }
        }
    }
  }
</script>
<style lang="scss" scoped>
 $border-radius: 4px;
 .i-button-group {
    display: inline-flex;
    vertical-align: middle;
    > .i-button {
      border-radius: 0;
      &:not(:first-child){
        margin-left: -1px;
    }
    &:first-child {
      border-top-left-radius: $border-radius;
      border-bottom-left-radius: $border-radius;
    }
    &:last-child {
      border-top-right-radius: $border-radius;
      border-bottom-right-radius: $border-radius;
    }
    &:hover {
        position: relative; z-index:1;
    }
  }
}
</style>